I was trying to get WiFi Tethering to work again and flashed a file that was supposed to fix it. It didn't.
(Edit: That file was "MD4HotspotMod-Odexed.zip"...)
Do I have to re-flash the last ROM I downloaded? I think it is still on either the internal storage or the external SD card.
"Power+Home+Volume UP" will flash a ROM, but I don't know where the ROM needs to be. I think I had to rename it "update.zip" and put it in the root of the internal memory last time...
"Power+Home+Volume DOWN" puts me into Team Win Recovery Project v22.214.171.124, but I don't know what to do in there.
(It is stuck at the glowing SAMSUNG logo when I attempt to boot normally...)
P.S. In TWRP, the last backup I did was apparently about a year ago... can I use that then once the phone works again, boot it up and restore via Titanium Backup?
Files I see on SD card
* eec955eb4a5b.update_SPH-L710_LI3_to_L. (can't read the rest... too long of a filename?)
Files in main memory (root)
* update.zip (?!)